The Effect of Different Pouring Interval of Conventional Impression on the Marginal Accuracy of Full Contour Zirconia Crowns in Comparison with Digital Impression : An in Vitro Study

2017 ◽  
Vol 29 (4) ◽  
pp. 1-6
Author(s):  
Elaf A. Hadi ◽  
Adel F. Ibraheem
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Digital Impression ◽  
Zirconia Crowns ◽  
Conventional Impression

Fracture Resistance of Additively Manufactured Zirconia Crowns when Cemented to Implant Supported Zirconia Abutments: An in vitro Study

2019 ◽  
Vol 28 (8) ◽  
pp. 893-897 ◽  
Author(s):  
Amirali Zandinejad ◽  
Mohammad Mujtaba Methani ◽  
Emet D. Schneiderman ◽  
Marta Revilla‐León ◽  
Dean Morton BDS
Keyword(s):  
Fracture Resistance ◽  
In Vitro Study ◽  
Vitro Study ◽  
Zirconia Crowns

scholarly journals EVALUATION OF INTERNAL ADAPTATION OF FULL CONTOUR ZIRCONIA CROWNS VERSUS VENEERED ZIRCONIA CROWNS – IN VITRO STUDY

2016 ◽  
Vol 62 (1) ◽  
pp. 717-719
Author(s):  
Abdulsattar Al-baadani ◽  
Rana Sherief ◽  
Ashraf Kheireldean
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Zirconia Crowns ◽  
Internal Adaptation

scholarly journals Feasibility of Using a Prosthetic-Based Impression Template to Improve the Trueness and Precision of a Complete Arch Digital Impression on Four and Six Implants: An In Vitro Study

Materials ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 3543
Author(s):  
Marco Tallarico ◽  
Aurea Lumbau ◽  
Roberto Scrascia ◽  
Gianluca Demelas ◽  
Franco Sanseverino ◽  
...  
Keyword(s):  
Test Group ◽  
In Vitro Study ◽  
Original Model ◽  
Vitro Study ◽  
Digital Impression ◽  
Control Group ◽  
Angle Deviation ◽  
Edentulous Mandible ◽  
The Mean

Background: Intraoral scanners (IOSs) in implantology represent a viable approach for single teeth or partial arches. However, when used for complete edentulous arches or long-span edentulous areas, it has been demonstrated that there is a need for improvement of IOS-related techniques. Therefore, the aim of this in vitro study was to assess the trueness and precision of a complete arch digital impression on four and six implants taken with or without a customized, prosthetic-based impression template. Materials and Methods: Two experimental models were prepared, representative of a complete edentulous mandible restored with four and six implants with built-in scan abutments. Models were scanned with (test group, TG) or without (control group, CG) the prosthetic-based impression template. Eight scans were taken for each model. The time needed to take impressions, error, trueness, and precision were evaluated. A statistical analysis was performed. Results: In the case of four implants, the time needed for the impression was 128.7 ± 55.3 s in the TG and 81.0 ± 23.5 s in the CG (p = 0.0416). With six scan abutments, the time was 197.5 ± 26.8 and 110.6 ± 25.2 s in the TG and CG, respectively (p = 0.0000). In the TG, no errors were experienced, while in the CG, 13 impressions were retaken due to incorrect stitching processes. In the four-implant impression, the mean angle deviation was 0.252 ± 0.068° (95% CI 0.021–0.115°) in the CG and 0.134 ± 0.053° (95% CI 0.016–0.090°) in the TG. The difference was statistically significant (p = 0.002). In the six-implant impression, the mean angle deviation was 0.373 ± 0.117° (95% CI 0.036–0.198°) in the CG and 0.100 ± 0.029° (95% CI 0.009–0.049°) in the TG (p = 0.000). In the TG, there were no statistically significant differences in the mean angle deviation within the group (p > 0.05), but there were in the CG. A colorimetric analysis showed higher deviations from the original model for the six-implant impression without a prosthetic template. Conclusions: Although all of the impressions exhibited deviation from the original model in the range of clinical acceptability, the prosthetic-based impression template significantly improved the trueness and precision of complete edentulous arches rehabilitated with four or six implants, making the complete arch digital impression more predictable.

scholarly journals Adaptation of zirconia crowns created by conventional versus optical impression: in vitro study

2017 ◽  
Vol 9 (3) ◽  
pp. 208 ◽  
Author(s):  
Sibel Cetik ◽  
Babak Bahrami ◽  
InÈs Fossoyeux ◽  
Ramin Atash
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Zirconia Crowns ◽  
Optical Impression
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